Pump.



S. L. CALVERT.

PUMP.

APPLICATION FILED JULY 17. I914.

Patented Nov. 16, 1915.

2 SHEETS-SHEET 2- SEBASTIAN I. CBLLVER-T, F GQWETA, QKLAHUMA, ASSIGNGR i315 ONE-Hill's}? T0 CHAIRLES I 5. LEECH, OF BARTLESVILLE, QKIJiHOMA.

PUMP.

,Ll third-Stil Patented Elev. Jill, Milli.

lrigiual applicaticin filed July 1, 1913.?5erial No. 776,5l4l3. lllvided and this application filed July 37, 1914..

Serial Ho. 851,551.

.To all whom may concern:

Be it known that l, SEBASTIAN L. CALVERT, a citizen of the United States, residing at Coiveta, in the county of Wagoner and State of Oklahoma, have invented new and useful Improvements in Pumps, of which the following is a specification.

This invention is an improved oil pump for pumping oil from oil wells and consists in the construdtion, combination and arrangement of devices hereinafter described and claimed.

One object ofthe invention is to provide an improved pump of this character which includes means for separating the sand and earthy particles from the oil while pumping the oil and causing the sand to be precipitated.

Another 'object is to effect improvements in the construction of the plunger. v

This application is a division of my coriding application for Letters-Patent of t e United States for improvements in pumps, filed July 1, 1913, Serial No. 776,843, allowed Feb. 24, l91 l.-

In the accompanying (rawings:-Figure l is a vertical sectional vie v of the operating parts of an oil well pump constructed in accerdancewith my invention. Fig. 2 is a detail elevation, on a larger scale, of the plunger. Fig. 3 is a detail vertical sectional view of the same. Fig. 4 is a detail sectic-rial view of the upper portion of the pump, showing the plunger tube valve and also showing the check valve in which the plunger tube operates. Fig. 5 is asimilar View of the lower portion of the pump showing the lower or standing valve and its connections. Fig. 6 is a sectional view of the same on a plane indicated by the line a-a of Fig. 1. y

In accordance with my invention; 1 provide an outer tubular body 1, which forms acasing for the sand chamber 2, the upper end of the said tubular body being connected by a suitable reducer 3 to the lower end of the pump tube 4 which reaches to the top of the Well and the lower end of the said outer tubular body 1 is screwed to the outer side of the upper portion of a reducer 5, the lower end of the reducer being connected by a sleeve 6 to the upper end of a perforated v inlet tube 7, which is arranged in the bot tom of the well and in which oil enters by the rock pressure. my

In the upper portion of the reducer 5 is a threaded opening 8 in which is screwed the lower end of a tubular cage 9, the upper portion of which is closed as at it) and provided with openings 11 in its wall, the said cage being formed with a valve seat liland a ball valve 13 being employed which is arranged in' the upper portion of the cage and is adapted to close downwardly on the seat.

In the casing or outer barrel 1 is an inner or working barrel 14: which of less diameter than the outer barrel, is spaced there from and the lower end of which is screwed to the upper end of the reducer as at 15-. The upper end of the working barrel is provided with a conical seat 16 having" aremovable packing head 17 and to the upper end of the working body is screwed there duced upper end 18 of a tubular or annular shield or apron 19 the diameter of which exceeds that of the working barrel so that the said shield or apron is arranged around and spaced from the upper portion of the working barrel and in and spaced from the outer barrel 1. The lower end of the said shield or apron is open. 'The working barrel Gil is provided near its upper end, at a point within the shield or apron with openings 20. The plunger 21 which is arranged to operate in the workihg barrel has a threaded central opening and is screwed to the lower end of a tube 22. Two pairs of split packing rings which are preferably made of brass and are indicatedat 23-24 are er ranged at some distance apart on the plunger .tube, the lower member of the lower packing rings 23 hearing directly on the plunger. A nut filfi is/screwed on the plunger tube 22 and bears (against the upper side of the upper ring 24 and between the rings 23-2 i are a. series of valve cups 26 which are made of leather or other suitable material and are separated from each other by washers 27 which are also arranged on the plunger tube 22 and are adapted to fit in the depressed central portions of the valve cups. The length of the plunger. tube is,

such that its upper end extends above the working barrel. The plunger tube is free to move vertically through a central open:

ldlfi ing in the removable packing head 17 and g p igieoneo the upper end of the plunger tube which is somewhat reduced, is scre'vvetlto the lower eml of a cage 28 in which is a ball valve 29 which is adapted to close downwardly on the seat 30 with. which the cage is providecl. The Wall of the cage has openings 3L and the cage is closed at its upper end as at 3:2 and provided with a threaded stem to which is screwed the lower end of a plunger rod 34 which extends to the upper-end of the well and is employed to impart vertical reciprocating motion to the plunger and its plunger tube.

The removable packing head 17 is provicled on its upper side with rings 31: which fit snugly around the plunger tube and while permitting the plunger tube to reciprocate prevents sand from going through the said removable packing heacll In the operation of my improved oil pump, oil is sucked into the lower portion of the Working barrel, at each upstroke of the plunger with its tube 22 and valve 2.9,

the valve 13 opening and the valve closmg. On each clown stroke of the plunger,

the valve 29 opens and the valve 123 closes and oil is forced upwardly through the plunger tube and past me valve 25) into the upwardly extending tube The barrel or outer body liills with oil the result of the operations of the plunger 4 and is kept full during the operation of the pump and such sand or other like material as is in the oil becomes preci iiitatetl untl. settles in the sand chan'iber 2 which. is formed by the space between. the barrel or outer body 1 and the working barrel 14.. The openings "20 in the upper portion of the Working barrel prevent air from being eoinpressed therein and interfering with the operation of theplunger and. the shield or apron. ll) -which is arranged around the upper end of the working barrel covers the said openings and prevents ulor the like from entering the Working imrrel, uhorr the plune'er through the said. opening. The rcmovable packing head 17 forms in effect a. stulling box for the plunger tube and prevents send from entering the upper portion of the Working barrel.

The arrangement and construction oi the parts of my improved oil pump are such as to greatly facilitate the assembling and theassemhling ot' the sumo and hence, eniihle all parts of the pump to be readily inspected and repaired, and also enable the send which accumulates in the said chamber to be discharged therefrom periodically as herein shown and described form of my invention, 1 would crstood that changes may be tor-in. proportion and construetion.- of the several parts without departing from the pirit or the. invention :and within the scope of the up iremleil claim.

Having thus described my invention, 1 claim An oil p 121p lungercomprising a. tubular hoiiv hu a. diumetrically rccluccul, intere poi on and having its upper and lower end portions. each provided with 1:.

peripheral annular rroovu, packing rings fitted in the will grooves and cups on he reduced intcrnuwliate portion and luau-eon said portions, thr rid. packing rings lacing adapted to it closely in a pump barrel and prevent sand. or the like from. getting to the *wluiercof l allix my signature u o WllDCSSLS. 

